Sawmill-carriage



(N5 Model.) 4 sheets-sheet 1.

N. SHAW. SAWMILL CARRIAGE.

NQ. 549,540. m5511555 NOT/.12, 1895.

Mah JMW (No Model.) l 4 sheets-sheet N. SHAW.;

SAWMILL CARRIAGE.

No. 549,540.- Patente '4 Sheets-Sheet 3.

(No Model.)

N. SHAW -SAWMILL CARRIAGE.

No. 549,540. Patented N0v. 12," 1895.

Maly Shy/w (No Model.) v 4 Sheets-Sheet, 4.

N. SHAW;

f SAWMILL CARRIAGE. No. 549,540. Patented Nov. "12, .1895. F59/ 4r- Y H945.

vda-@zsm i MSI] UNITED STATES PATENT OEEIcE.

NOAH SIIAV, OF EAU CLAIRE, WISCONSIN.

sAwlvlILL-GARRIAGE.

SPECIFICATION forming part of Letters Patent No. 549,540, dated November 12, 1895.

Application filed January 23, 1894. Serial No. 497,800. (No model.)

To all whom it may concern.-

Be it. known that I, NOAH SHAW, a citizen of the United States, residing at Eau Claire, in the county of Eau Claire and State of Wisconsin, have invented a new and useful Sawmill-Carriage, of which the following is a specilication.

The invention relates to improvements in sawmill-carriages.

I-Ieretofore great loss has been incurred in the sawing of lumber on account of the carriage carrying the head-blocks and log not being held rigidly in place while the boards are being sawed from the logs, there beingv more or less movement out of a straight line, and the result of this loss has in one instance eX- perienced amounted to about one million feet of lumber out of a lot of twenty million feet sawed, and the cause is in the main due to the improper manner of offsetting employed, and not, as has generally been believed, to want of skill of the mill-Sawyer, who usually has to bear the blame. These losses have generally been experienced with those sawmill-carriages inwhich the carriage or the frame of the carriage moves transversely of the latter with the head-blocks in effecting the operation of offsetting.

The object of the present invention is to provide a simple and comparatively ineXpensive sawmill-carriage which will be adapted at the end of each forward cut to offset the log from the saw to prevent the latter from coming in contact with the log in gigging back and being dragged off the wheels on which it runs, and also to prevent it from` blocks when in position for sawing rigidly with entl y of one another to conform to any irregularity or the natural taper of a log.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure l is a transverse sectional view of a sawmill-carriage constructed in accordance with this invention. Fig. 2 is a plan view of the same. Fig. 3 is a side elevation of the sawmill-carriage. Fig. 4 is a detail view illustrating the manner of adj ust-ably connecting the shifting standards with the top and bottom plates of the carriage-frame. Fig. 5 is a side view of the top and bottom plates. Fig. 6 is a detail view of one of the shifting standards. Fig. 7 is a detail view of the upper bearing-plate of one of the standards. Fig. 8 is an enlarged detail sectional view of one of the side beams, showing the connection between the head-blocks and the carriage. Fig. 9 is a detail view of the eccentric. Fig. l0 is a transverse sectional view of a sawmill-carriage, showing a modification of the invention. Fig. ll'is a detail view showing a modification of the head-block. i

Like numerals of reference indicate corresponding parts in all the figures of the drawings. n' r l l designate longitudinal beams of a sawmill-carriage frame 2, provided with suitable bearings 3 for axles 4, on the ends of which are journaled wheels 5 and 6. The wheel 5 has a liiat tread and runs on a corresponding track bar or rail 7, and the wheel 6 has a grooved periphery and runs on an oppositelybeveled track bar or rail 8, which conforms to the configuration of the tread of the wheel, whereby the sawmill-carriage is prevented from moving transversely of the length of the track.l Each axle-4 is provided adjacent to the inner end of each bearing 3 with a threaded portion 9, and mounted thereon is an interiorly-threaded collar 10, composed of two sections connected by upper and lower bolts l1, which clamp the sections tightly on the axle to prevent any accidental unscrewing. These collars greatly contribute to the rigidity ofV IOO lar 10, the nuts 12 of the bolts thereof are loosened to permit the collar to be turned on the threaded portion 9, and after proper adjustment the nuts are again tightened to clamp the sections. The bearings 3 for the axles are rigidly and immovably secured to the saw-carriage frame in order that the latter may have no transverse movement on the axles, and they are provided with caps 13 for oil or other lubricants.

Adjacent to each pair of head-blocks 14 are located upper and lower plates 15 and 1G, secured, respectively, to the upper and lower faces of the longitudinal beams 1. The up'- per plate is provided with depending flanges 17, which embrace the sides of the adjacent longitudinal beam, and the inner flange is provided with a pair of perforated ears 1S. The upper and lower plates 15 and 1G are firmly bolted to the longitudinal beam, and upper and lower bearing-plates 19 and 2O are mounted, respectively, in vertical openings or recesses of the head-blocks 1l and the lower or bottom plates 16. The bearing-plates 19 and 2O have their lower and upper edges, respeetively, concavely grooved longitudinally and forming bearings for and receiving rounded upper edges 21 of a shifting or oscillating standard 22. The shifting or oscillating standard 22 is arranged in a vertical slot or opening 23 of the longitudinal beam, and it moves independently of the latter, which is absolutely stationary with relation to the standard and the truck of the sawmill-earriage. The lower bearing-plate 2O is mounted for vertical adjustment and is adjusted and secured at the desired adjustment by means of screws 2l, provided with jam-nuts 25 and adapted to raise and lower the standard 22 to cause the latter to project above the upper face of the top plate or saddle 15 to hold the head-blocks out of contact therewith,whereby the head-blocks may be moved transversely of the carriage for offsetting a log with the minimum amount of friction and with great rapidity. The head-blocks are guided in this offsetting movement by upward-projecting flanges 2b' of the top plate or saddle 15.

The perforated ears 18 have secured between them the outer ends of connectin g-rods 27, which connect the head-blocks with the frame. The head-blocks move transversely of the frame for offsetting a log and are entirely independent of the frame in their offsetting movements, and they have journaled on them in suitable bearings a longitudinallydisposed shaft 28, which carries adjacent to each pair of head-blocks an eccentric 29. The inner ends of the connecting-rods, which are slightly upwardly and inwardly inclined, are provided with yokes 30, which are arranged on the eccentric 2), whereby when the eccentric is turned the head-blocks will be moved transversely of the sawmill-carriage to offset or onset a log. This connection between the head-blocks and the sawmill-carriage braces and holds the former firmly and securely in position for making a cut and absolutely prevents any liability of accidental movement, which might deface or turn out imperfect lumber.

ln order to enable the connections between the head-blocks and the sawmill-carriage to be adjusted with absolute accuracy, each connecting-rod 27 is composed of threadedinner and outer sections, which have their adjacent ends connected by a turnbuckle 31 to vary the length of the connecting-rod. The turnbuckle is polygon al to form a wrench-seat, and each section of the connecting-rod is provided with a jam-nut The shaft 28 is rocked by means of ahandlever 33, arranged vertically at one side of the sawmill-carriage and fulcrumed-on the frame between ears 34 and extending below the longitudinal beams and connected by a bar 35 with a depending arm 3U of the head-block-operating roekshaft 28. The head-blocks may be readily and rapidly off or on set by the hand-lever 33, owing to the particular manner of mounting the headblocks, which, although arranged between the upward-projecting flanges of the top plate 15 and slightly out of contact with the upper face of the top plate, are securely and rigidly held against accidental movement by the eccentric connections between them and the frame of the sawmill-carriage. The frame 2, the axles 4, and the wheels, which constitute the carriage proper, are incapable of transverse movement, and they serve to form a rigid and secure support for the head-blocks when the latter are in position for makin a cut in a manner which would be impossible were the frame capable of transverse movement on the axles.

Each of the knees 37 is provided with separate set-up mechanism of any suitable construction to enable the knees to be adjusted separately with relation to the head-blocks on which they are mounted, in order that the knees may conform to any irregularity or the natural taper of a log. The knees are also provided with any suitable (logging mechanism.

By the construction heretofore described a log may be offset from a saw at the end of each forward movement or cut to enable it to be gigged back for another cut without coming in contact with the saw and without being defaced, and also without dragging the bandsaw from off the wheels and otherwise injuring the mechanism of the sawmill, and in connection with this operation it will be apparent that the head-blocks are rigidly connected with the carriage by means adapted to permit the offset movement a-nd capable of preventing accidental movement of the headblocks at any time, and affording when the head-blocks are onset, preparatory to making a forward movement or cut, a connection bctween the head-blocks and the carriage as firm and as secure as though the head-blocks were mounted stationary on the carriage. lt

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'w'vill also be seen that the offsetting movement is accompanied by a minimum amount of friction, and that the top plates or saddles are relieved of Wear, and that the head-blocks are enabled to make their offsetting movements Without frictional resistance, which Would result from contact With the top plates or saddles. The connecting-rods form oppositelyinclined braces, Which support the head-blocks from both sides of the frame and equally distribute the strain throughout the carriage.

In Fig. l0 of the accompanying drawings is illustrated a modification of the invention. A single eccentric connecting-rod 27 is employed, and this is arranged at one side of the sawmill-carriage frame. The head-blocks 14 are provided with depending bearings, in which is j ournaled a longitudinal head-blockoperating shaft 28a, on which are mounted at intervals eccentrics 29a. The adjustable connecting-rods 27 are each provided at its outer end with a yoke, which is arranged on the eccentric 294, and the inner end of each connecting-rod is. pivotally connected With the sawmill-carriage frame. The head-block-operating shaft 281L is rocked by a hand-lever 33n for producing the offsetting and onsetting operations.

In order to render the offsetting and onsetting movements of the head-blocks frictionless, antifriction-rollers'SS may be employed. rI`hese antifriction-rollers are interposed betWeen the head-blocks 14a and the sawmill-carriage frame, Which is provided With Wear-plates 39, and the latter have upward-extending iian ges, which serve to retain the antifriction-rollers in proper position. Each end of each antifriction-roller may have cog-teeth 4l, which are geared into short racks 42 of the plate 39 and the head-block, Whereby the antifriction-rollers are positively retained in their operative position at right angles to the head-block.

The head-blocks may, as illustrated in Fig. ll of the accompanying drawings, be connected with the sawmill-carriage frame by tongue-and-groove connections 43 and 44.

Changes in the form, proportion, and the minor details of construction may be resorted to Without departing from the principle or sacrificing any of the advantages of this invention.

What I claim isl l. In a saW mill carriage, the combination With axles and Wheels, of a saw mill carriage frame rigidly mounted on the axles, head blocks mounted on the frame and having a limited movement transversely and independently thereof, and the rigid bracing connections hingedly attached to the sides of the frame and movably connected With the head blocks, substantially as described.

2. In a saW mill carriage, the combination with axles and Wheels, of a saW mill carriage frame rigidly mounted on the axles, head blocks mounted on the frame and having a limited .movement transversely and indepen dently there of, the movable supports holding the head blocks slightly above the frame, and connections for operating and locking the head blocks against accidental movement on the frame, substantially as described.

3. In a saw mill carriage, the combination With axles and Wheels, of a saw mill carriage frame rigidly mounted on the axles, head blocks mounted on the frame and having a limited movement transversely thereof, and the connections between the head blocks and the frame for supporting the former slightly above the latter and for operating and locking the head blocks against accidental movement on the frame, substantially as described.

4. In a saw mill carriage, the combination With axles and Wheels, of a saw mill carriage frame rigidly mounted on the axles, head blocks mounted on the frame and having a limited movement transversely thereof, and

the oppositely disposed rigid inclined connections extending transversely of the carriage frame from one side to the other, and having their outer ends secured to the frame and having their inner adjacent ends movably connected With the head blocks, substantially as described.

5. In a saw mill carriage, the combination of the saw mill carriage frame, axles, Wheels, and independently constructed head blocks, the head block operating shaft, a lever connected therewith, the eccentric, the turn ybuckle rod, and means for connecting the head block With the frame, whereby it is alloWed to offset independently of the saw carriage, substantially as described.

6. In a saw mill carriage, the combination with axles and Wheels, of a saw mill carriage frame rigidly mounted on the axles and secured against transverse movement thereon, head blocks having a limited movement transversely of the frame and independently thereof, an eccentric carried by the head blocks, a connecting rod extending from the eccentric to the frame'and forming a rigid brace and lock, and means for operating the eccentric, substantially as described.

7. In a saw mill carriage, the combination with axles and Wheels, of a sawmill carriage frame mounted on the axles, the head-blocks having a limited movement transversely and independently of the frame, an eccentric carried by the head-blocks and located centrally thereof, the oppositely disposed inclined connecting rods extending from the eccentric to opposite sides of the frame and bracing and supporting the head-blocks, and means for operating the eccentric whereby the headblocks are moved transversely of the frame independently thereof, substantially as described.

8. In a saw mill carriage, the combination 'With axles and Wheels, of a saw mill carriage frame mounted on the axles, the head-blocks having a limited movement transversely and independently of the frame, a centrally dis- IOO IIO

posed longitudinally arranged shaft provided with an arm and journaled on and carried by the block-heads, an eccentric mounted on the shaft, the oppositely disposed connecting rods extending` from the eccentric to opposite sides of the frame, and an operating lever connected with the arm of the shaft, substantially as described.

0. In a saw mill carriage, the combination with axles and wheels, of a saw mill carriage frame rigidly mounted on the axles and provided at opposite sides with openings,the head blocks mounted on the frame and having a limited movement transversely and independently thereof, the upper and lower bearing plates carried by the head-blocks and the frame, and the shifting or oscillating standards arranged in the openings ofthe frame and having their ends journaled on the bearing plates and being vertically adjustable through said openings and supporting the' head-blocks out of contact with the frame, substantially as described.

l0. In a saw mill carriage, the combination of a saw mill carriage frame, independently movable head-blocks mounted on the frame, the oscillating standards mounted on the frame and supporting the head-blocks out of contact with the same, and means for adjusting the standards vertically, substantially as described.

ll. In a saw mill carriage, the combination of a saw mill carriage frame, independently movable head-blocks mounted on the frame, the upper and lower bearing plates carried by the head blocks and the frame, the shifting standards having their ends journaled on the bearing plates and supporting the head-blocks out ot contact with the frame, and the screws mounted on the frame and supporting the lower bearing plates and adapted to adjust the standards vertically, substantially as dcscribed.

]2. In a saw mill carriage, the combination of a sawmill carriage frame having longitudinal beams provided with vertical openings, the top bearing plates or saddles having npward extending guide flanges and provided with depending` flanges embracing the sides of the beams, the bottom plates provided with vertical recesses and having threaded openings below the recesses, independently movable head blocks mounted on the frame, the upper bearing plates carried by the headblocks, the lower bearing plates arranged in the vertical recesses of the bottom pl ates,shift ing standards arranged in the openings of the beams and having their upper and lower edges journaled on said bearing plates, and screws arranged in the threaded openings of the hottom plates for adjusting the standards vertically, substantially as described.

13. In a sawmill carriage, the combination of a saw mill carriage frame provided with bearings, an axle journaled in the bearings and provided adjacent to the inner ends thereof with threaded portions, and the interiorly threaded clamping collars arranged on the threaded portions of the axle, substantially as described.

ll. In a saw mill carriage, the combil'iation of a saw mill carriage frame provided with bearings,an axle arranged in the bearin and provided adjacent to the inner ends thereof with threaded portions, and the interior-l y threaded collars arranged on the threaded portions of the axle, and composed ot' two separable sections detaehably connected at their ends and thereby clamped on the axle, substantially as described.

l5. In a sawmill carriage, the combination with axles and wheels, of a saw mill carriage frame rigidly mounted 011 the axles, headblocks mounted on the frame and having a limited movement transversely and in dependentlythereof,the oppositely inclined connecting rods having their outer ends hinged to the sides of the frame and composed of inner and outer sections adjustably connected, and means for movably connecting the inner ends of the rods with the head blocks, substantially as described.

I6. In a saw mill carriage, the combination with axles and wheels, ot' a saw mill carriage frame rigidly mounted on the axles, headblocks mounted on the frame and having a limited movement transversely and independentl y thereof, and the oppositel y inclined connecting rods having their outer ends hinged to the sides of the frame and movably connected at their inner ends with the headblocks, substantially as described.

In testimony that I claim the foregoing as my own I have hereto aiiixed my signature in the presence of two witnesses.

NOAH SlIAlV.

lYitnesses:

E. V. SLAWsoN, J. R. BAKER.

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